⁂ What can Stellar do?

Stellar turns your calendars into a smart, rule-driven system. Here's what's possible.

🔁 Sync events between calendars

The core feature. Set up a rule and Stellar automatically copies matching events from one calendar to another — keeping them in sync as things change or are cancelled. Works across Google, Apple, and Outlook calendars. Rules can copy everything, or filter by hashtag so only selected events cross over.

Copy events with hashtag filtering

Event on "Work" calendar
Team offsite — Chicago
#personal
→
Appears on "Family" calendar
  • Team offsite — Chicago
    Mon Jul 14  ·  copied automatically

Copy events as "Busy" (hide details)

Event on "Personal" calendar
Doctor appointment
#busy
→
Appears on "Work" calendar
  • Busy
    Tue Jul 15  ·  2:00–3:00 PM  ·  no details shown
Good for
  • Sharing work travel or blocked time with family without giving full calendar access
  • Pulling a coach's or teammate's schedule onto your own calendar
  • Mirroring a shared calendar to your personal one (across providers)
  • Blocking time on your work calendar for personal commitments, without showing what they are

🗓 Expand a list of events from one master

Create a single "master" event and list out dates in its description. Stellar generates a separate calendar event for each entry — with the right title, time, notes, and a link back to the master. Add or remove dates and the calendar updates automatically on the next sync.

Master event description
#stellar-series
#title: %s — PNC Park
#url: https://pirates.com/tickets

#event: 2026-07-04 18:35 21:30 | Pirates vs Cubs | Fireworks night
#event: 2026-08-02 13:05 16:00 | Pirates vs Braves
#event: 2026-09-06 19:05 22:00 | Pirates vs Cardinals | Fan appreciation
→
Three events appear on your calendar
  • Pirates vs Cubs — PNC Park
    Sat Jul 4  ·  6:35–9:30 PM  ·  Fireworks night
  • Pirates vs Braves — PNC Park
    Sun Aug 2  ·  1:05–4:00 PM
  • Pirates vs Cardinals — PNC Park
    Sun Sep 6  ·  7:05–10:00 PM  ·  Fan appreciation
Works for theater subscriptions too
#stellar-series
#title: %s — Benedum Center
#url: https://pittsburghculturaltrust.org

#event: 2026-10-17 20:00 22:30 | Hamilton | Row G, seats 12–13
#event: 2026-11-28 14:00 17:00 | Nutcracker | Row G, seats 12–13
#event: 2027-02-14 20:00 22:30 | Les Misérables | Row G, seats 12–13
→
One event per performance
  • Hamilton — Benedum Center
    Sat Oct 17  ·  8:00–10:30 PM  ·  Row G, seats 12–13
  • Nutcracker — Benedum Center
    Sat Nov 28  ·  2:00–5:00 PM  ·  Row G, seats 12–13
  • Les Misérables — Benedum Center
    Sun Feb 14  ·  8:00–10:30 PM  ·  Row G, seats 12–13
Good for
  • Season tickets — sports, theater, concerts
  • Race series — a list of local 5Ks, road races, or events you're targeting
  • Recurring meetups or club events with irregular dates
  • Any list of dates you want to manage in one place
Syntax reference: #event: lines follow the format YYYY-MM-DD [HH:MM [HH:MM]] | Name | Optional notes. The title template uses %s as a placeholder for the event name (and %c for the calendar name). If you omit #title:, the master event's title is used for all children. See the hashtag reference for full syntax details.
Which calendars? Stellar expands a series only on calendars it scans — sync-rule sources, or any calendar you turn on with the “scan” checkbox under Your Calendars on the dashboard.

🏃 Generate a training plan from a race event

Add a few hashtags to a race event on your calendar and Stellar builds a full training schedule — paced workouts from today through race day, including taper and recovery weeks. Plans adapt automatically if you change your goal or race date. Multiple races are handled as a single coordinated program.

Race event description
Boston Marathon 2027
#stellar-train
#marathon
#goal:3:30
#priority:A
#level:intermediate
→
Training events appear on your calendar
  • Easy 5 mi · 9:45/mi
    Mon · Week 1
  • Tempo 7 mi · 8:02/mi
    Wed · Week 1
  • Long run 14 mi · 10:10/mi
    Sat · Week 1
  • … and so on through race day
Good for
  • Marathons, half marathons, 10Ks, and 5Ks
  • Multiple races in a season — Stellar coordinates them into one program
  • Tune-up races (B/C priority) that slot into a bigger training block
Training plans currently require a Google Calendar as the destination. Paces use the VDOT method and are calculated from your goal finish time. See the hashtag reference for all available options.
Which calendars? Stellar reads #stellar-train only on calendars it scans — sync-rule sources, or any calendar you turn on with the “scan” checkbox under Your Calendars.

More features are in development. Questions? Email support@stellarcalendar.com.